/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free SoftwareFoundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package javax.servlet.jsp.tagext;

import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.JspException;

/**
 * Adapts an object to the tag hierarchy.
 */
public class TagAdapter implements Tag {
  private SimpleTag _adaptee;
  
  /**
   * Creates a new adapter.
   */
  public TagAdapter(SimpleTag adaptee)
  {
    _adaptee = adaptee;
  }

  /**
   * Returns the wrapped object.
   */
  public JspTag getAdaptee()
  {
    return _adaptee;
  }

  /**
   * Returns the parent tag.
   */
  public Tag getParent()
  {
    JspTag parent = _adaptee.getParent();

    if (parent == null)
      return null;
    else if (parent instanceof Tag)
      return (Tag) parent;
    else
      return new TagAdapter((SimpleTag) parent);
  }

  /**
   * Stubbed.
   */
  public void setPageContext(PageContext pc)
  {
    throw new UnsupportedOperationException();
  }

  /**
   * Stubbed.
   */
  public void setParent(Tag parent)
  {
    throw new UnsupportedOperationException();
  }

  /**
   * Stubbed.
   */
  public int doStartTag() throws JspException
  {
    throw new UnsupportedOperationException();
  }

  /**
   * Stubbed.
   */
  public int doEndTag() throws JspException
  {
    throw new UnsupportedOperationException();
  }

  /**
   * Stubbed.
   */
  public void release()
  {
    throw new UnsupportedOperationException();
  }

  public String toString()
  {
    return "javax.servlet.jsp.tagext.TagAdapter[" + _adaptee + "]";
  }
}
